WO2022264578A1

WO2022264578A1 - Packaging body

Info

Publication number: WO2022264578A1
Application number: PCT/JP2022/012005
Authority: WO
Inventors: 宏彦加藤
Original assignee: 大王製紙株式会社
Priority date: 2021-06-15
Filing date: 2022-03-16
Publication date: 2022-12-22
Also published as: TW202300415A; CN116744828A; JP2022190792A; EP4286296A1

Abstract

[Problem] To provide a film packaging body for sanitary tissue paper sheets and that has superior openability. [Solution] The above problem is solved by this packaging body having packaged therein a bundle of sanitary tissue paper sheets in a packaging film made of soft resin. Said packaging body has, on a top surface thereof, a takeout port formation part that is formed by annularly providing an easily-tearable open line. A portion of the easily-tearable open line that constitutes an edge of at least one end of the takeout port formation part in the width direction is formed by perforations in which deformed cut sections having a dog-legged end-cut portion joined to one end or both ends of a main cut portion at an angle of 90° or more are arranged with non-cut portions therebetween. Said end-cut portion and an end of another adjacent deformed cut section having no end-cut portion are configured to overlap each other at a position on the outer side and/or center side of the takeout port formation part in the width direction, and the overlap between said end-cut portion and the end having no end-cut portion is configured such that the deformed cut section located on the outer side in the width direction of the takeout port formation part is located on the further outer side in the width direction of the takeout port formation part.

Description

package

The present invention relates to a package in which a bundle of folded sanitary thin paper such as paper towels is wrapped in a flexible packaging film.

As a packaging form of sanitary thin paper such as paper towels and facial tissues, a so-called pop-up type bundle in which one or more plies are folded and stacked, and when the top sheet is picked and pulled out, a part of the next sheet is pulled out. A form of packaging with a resin-made flexible packaging film is known.

In the past, such sanitary thin paper packages generally used simple linear perforations for forming the outlet and formed a slit-shaped outlet on the top surface. . However, if the slit length is long, the slit-shaped outlet has a problem that the sheets will fall inside when the number of sheets remaining inside is reduced. In addition, it is difficult to pull out a single sheet from the film, and the pull-out resistance becomes too high at the beginning and end of use, and when the sheet is pulled out, the packaging film may be lifted up and cannot be popped up.

Therefore, in order to solve the problem of the slit-shaped outlet, perforations for forming the outlet are arranged in an elongated annular shape extending in the longitudinal direction by a die-cutting technique such as die-cutting, so that the outlet has a substantially elliptical shape. It has been practiced to have a width in the depth direction as shown in

Patent Documents

1 and 2 below. Furthermore, in recent years, in order to further improve the ease of taking out, the outlet has been made into a substantially gourd-shaped shape with widened ends in the width direction.

However, conventional approximately oval or approximately gourd-shaped outlets emphasize softness and suppleness. It is designed mainly for sanitary tissue paper such as this, and it is easy to use for wiping the skin other than the face and wiping items. It is not always suitable for sanitary tissue papers such as paper towels, which are mainly used for wiping hands after washing hands, which are stiffer than facial tissue papers.

In order to improve the ease of taking out such sanitary thin paper, it is conceivable to form a wider outlet in the depth direction. It is difficult to design the same way as , and if the depth direction of the outlet is simply widened, the pop-up failure in which the next sanitary thin paper does not pull up when it pops up, and the rise failure in which the package falls down instead of standing up on the top surface of the package. It becomes easy to occur in.

On the other hand, for example, like the substantially elliptical outlet forming portion shown in FIG. As shown in 9(b), there is an advantage that an extraction port can be easily formed by cutting off the annular perforated area 105Z from one end 105A in the longitudinal direction X toward the other end 105B. However, when such an unsealing operation is performed, the direction in which the perforation 150 is torn as it approaches the perforation 150e at the other end, which is cut off last at the other end 105B, is the direction in which the annular perforation inner area 105Z is pulled. Therefore, as shown in FIG. 9(c), tearing of the perforation 150 is smooth and continuous at this end, particularly in the vicinity of the perforation 150e at the end of 105B. As shown in FIG. 9(d), an unintended tear 105P may occur at the end of the outlet 106. As shown in FIG. In the outlet forming portion 105 formed by annularly arranging the perforations 150, as the end portion in the width direction is widened in the depth direction Y, the range of the perforations becomes closer to the direction orthogonal to the tear-off direction. Being longer, this tearing is more likely to occur. Therefore, the approximately gourd-shaped outlet forming portion with widened ends is likely to cause the tear 105P.

Furthermore, especially when the packaging film is a uniaxially stretched film stretched in a direction Y perpendicular to the longitudinal direction X of the outlet forming portion 105, such a tear 105P is more likely to occur. In addition, in the case of pillow packaging and gusset packaging, the longitudinal direction (MD direction) of the packaging film is generally parallel to the longitudinal direction of the outlet forming part. is likely to occur.

JP 2018-052559 A JP 2018-058654 A

Therefore, in view of the above-mentioned problems, the main object of the present invention is to improve the opening property by preventing the widthwise edge of the outlet from being torn when unsealed, and to improve the drawing property of sanitary thin paper, especially hard sanitary thin paper such as paper towels. To provide an excellent packaging body for film packaging.

Means for solving the above problems are as follows.
The first means is
A packaging body in which a bundle of sanitary thin paper is wrapped with a flexible resin packaging film,
Having an outlet forming portion formed by arranging an easy-cleavage line in a ring on the upper surface,
The easy-cleavage line forming the edge of at least one end in the width direction of the outlet-forming portion,
At one end or both ends of the main cut portion, a dogleg-shaped end cut portion is connected at an angle of 90° or more, and the modified cut portion has perforations arranged through the non-cut portion,
The end cut portion and the end portion of the adjacent modified cut portion where the end cut portion is not provided overlap at least one of the outer side and the center side in the width direction of the outlet forming portion. , and
As for the overlap between the end cut portion and the end portion where the end cut portion is not provided, the deformed cut portion located on the outer side in the width direction of the outlet forming portion is positioned more outward in the width direction of the outlet forming portion. side by side, overlapping
A package characterized by:

The second means is
The outlet forming portion includes a narrow portion extending in the width direction at the central portion in the depth direction, and a widened portion continuously extending from the end portion of the narrow portion toward the outside in the width direction and gradually widening as it separates from the narrow portion. and a curved convex portion that is continuous with the widened portion and bulges outward in the width direction,
The package according to the first means, wherein the portion forming the edge of at least one curved convex portion of the easy-cleavage line has perforations in which deformed cut portions and non-cut portions are alternately arranged. is.

A third way is
The packaging body according to the second means, wherein 80% or more of the area forming the edge of the curved convex portion is perforations in which the deformed cut portion and the non-cut portion are alternately arranged.

A fourth means is
The package according to the second means, wherein the length of the curved protrusion in the depth direction is 25 to 45 mm, and the length of the protrusion in the width direction is 2.5 to 12.5 mm.

A fifth means is
The outlet forming portion has a width direction length of 70% or more of the width direction length of the upper surface of the bundle, and a maximum length in the depth direction of 10 to 40% of the depth direction length of the upper surface of the bundle. The length in the width direction of the narrow part is 50 to 70% of the length in the width direction of the upper surface of the bundle, and the length in the depth direction is 0.5 of the length in the depth direction of the upper surface of the bundle It is a package according to the above second to fourth means, wherein the content is up to 10%.

ADVANTAGE OF THE INVENTION According to the present invention, there is provided a film packaging package which is excellent in unsealability because the edge in the width direction of the outlet is difficult to tear when unsealed, and which is excellent in pulling out sanitary thin paper, particularly hard sanitary thin paper such as paper towels. be.

It is a perspective view for demonstrating the package which concerns on this invention. FIG. 3 is a perspective view for explaining a bundle of sanitary thin paper; It is a top view for demonstrating an outlet formation part. It is a perspective view for demonstrating the usage condition of the package which concerns on this invention. It is a partially enlarged view for explaining an outlet forming portion. It is a figure for demonstrating the other example of an outlet formation part. It is a figure for demonstrating another example of a shape of an outlet formation part. FIG. 11 is a diagram for explaining another example of the outlet forming portion; It is a figure for demonstrating the conventional outlet formation part.

A description will be given below with reference to FIGS. 1 to 8, which are embodiments of the present invention. It should be noted that directions such as up-down direction and left-right direction in the present invention and this specification are changed depending on the orientation of the package, and do not mean the absolute direction of the space. Further, rigidity is sometimes referred to as stiffness, rigidity, and stiffness of paper.

A packaging body 1 according to the present invention is a bundle 3 of sanitary thin paper sheets 2 such as paper towels folded and stacked, and wrapped in a flexible packaging film 4. An outlet forming portion 5 is provided on an upper surface 4C. have. The package 1 has a top surface 4C, a bottom surface 4D facing the top surface 4C, and long and

short sides

4B and 4A positioned between the top surface 4C and the bottom surface 4D so as to approximate the shape of the bundle 3. It has a substantially hexahedral shape.

1 to 4 show embodiments of gusset packaging. This gusset packaging is a pillow packaging with a gusset, in which a bundle 3 as an object to be packaged is wrapped in a cylindrical shape so that openings are formed at both ends in the longitudinal direction with a packaging film 4, and the bundles are overlapped in the winding direction. The portion 4X to be connected is adhered by fusion processing or an adhesive at the bottom position of the bundle 3, etc., and the edge of the portion extending beyond the short side surface 3A of the bundle 3 is fusion-bonded from the top and bottom while forming a gusset. The short side surface 4A is used as a sealing surface by bonding with an adhesive agent. In this gusset packaging, the sealing surface, which is the short side surface 4A, faces the short side surface 3A of the bundle 3, and the long side surface 4B, which is the gusset, faces the long side surface 3B, which is the folding surface of the bundle 3. However, in the present invention, the packaging form of the package 1 is not limited. A simple pillow packaging without a gusset may be used, and other suitable packaging forms such as overlap packaging, also called caramel packaging, in which short sides 4A are overlapped and fused together as shown in FIG. can be

The bundle 3 of sanitary thin paper 2 contained in the package 1 according to the present invention is a so-called pop-up bundle. As shown particularly in FIG. 2, this bundle 3 is such that the rectangular sanitary thin paper 2 is folded in two, and the folded pieces 2B of the other sanitary thin papers 2 located above and below are positioned on the folded inner side 2A. A plurality of sanitary thin paper sheets 2 are folded and laminated, and has a pair of longitudinal side surfaces 3B where the folding edges 2C of each sanitary thin paper sheet 2 are arranged, a pair of short side surfaces 3A where the folding edges 2C are not arranged, and further the short side surfaces. It has a substantially rectangular parallelepiped shape having a pair of flat surfaces (upper and lower surfaces) 3C that are connected to 3A and longitudinal side surfaces 3B.

The number of sets of sanitary thin paper 2 constituting the bundle 3 is not limited, but can be 30 to 240 sets with one ply or multiple plies as one set. The size of the bundle 3 is also not limited, but a bundle of 200 sets of sanitary thin paper is preferably 30 to 100 mm in height x 150 to 250 mm in the longitudinal direction (width) x 100 to 130 mm in the lateral direction (depth). . Further, when the height of the bundle is shorter than the length of the upper surface of the bundle in the depth direction, the pop-up failure improvement effect of the present invention is enhanced.

The filling rate of the bundle 3 in the package 1 is not limited as long as it does not interfere with the effects of the present invention, but the gap between the bundle and the packaging film is preferably in the range of 0 to 30 mm. The bundle 3 may be wrapped in a slightly compressed state in the vertical direction with the wrapping film.

Each of the sanitary thin papers 2 constituting the bundle 3 has a single-layer structure of one sheet or a laminated structure of a plurality of sheets. Although the number of plies is not limited, it is preferable to use one layer (1 ply) or two layers (2 plies). Although the basis weight per ply is not limited, it is preferably 10 to 40 g/m ² . Desirably, the mass per set is 1.0 to 2.5 g. The sanitary thin paper with one or two plies of sheets having the above basis weight is particularly suitable for paper towels suitable for wiping hands after washing hands. Furthermore, it is desirable that the thickness of one set of this sanitary thin paper is 100 to 500 μm. Sanitary thin paper with such a number of plies, a basis weight, and a paper thickness can be hygienically processed at the time of pop-up due to the configuration of the present invention, particularly the shape of the characteristic outlet forming portion having a narrow width portion, a widened portion, and a curved convex portion. It is highly effective in improving pop-up defects in which the thin paper falls without being pulled up, and erection defects in which the package does not stand up and falls down.

The basis weight is based on the measurement method of JIS P 8124 (1998). The grammage per ply can be calculated by grammage=sheet weight per set/(sheet area×number of plies). In addition, the thickness of the paper was determined by fully conditioning the test piece under the conditions of JIS P 8111 (1998), and then using a dial thickness gauge (thickness measuring instrument) "PEACOCK G type" (manufactured by Ozaki Seisakusho Co., Ltd.) under the same conditions. and the value measured in the state of multiple plies using an equivalent machine.

Also, the sanitary thin paper 2 according to the present invention is a dry type, not a so-called wet type impregnated with a chemical solution. Therefore, the bundle 3 formed by the sanitary thin paper 2 contains a lot of air. Among the dry-type sanitary thin papers 2, there is also a chemical-imparted type in which a chemical solution such as a moisturizing component that increases moisture by absorbing moisture such as polyol represented by glycerin is added. good too.

The raw material pulp constituting the sanitary thin paper 2 is not limited. A mixture of softwood-derived pulp such as NBKP and hardwood-derived pulp such as LBKP may be mentioned. In addition, waste paper pulp may be blended, or waste paper pulp may be used alone. In the present invention, it is preferable that the softwood-derived pulp is more than 50% in order to exhibit particularly excellent effects in sanitary thin papers such as paper towels that have strong stiffness and high rigidity.

Although the dry tensile strength of the sanitary tissue paper 2 is not limited, those having a longitudinal direction of 1000-3000 cN/25 mm and a lateral direction of 250-1500 cN/25 mm are particularly suitable for the present invention. Dry tensile strength is measured according to JIS P8113 (1998). Examples of measuring devices include Minebea Co., Ltd.'s "Universal Tensile Compression Tester TG-200N" and its equivalent.

The outlet forming part 5 is formed by annularly arranging an easy tear line 50 on the upper surface 4C facing the uppermost sanitary thin paper 2 of the bundle 3 of the packaging film 4 . Note that the term “annular” in this specification does not mean that the shape is limited to a circular shape or an elliptical shape, but means a shape in which a closed region is formed. Such an outlet forming portion 5 tears the easy-cleavage line 50, separates and removes the range surrounded by the easy-cleavage line 50, and draws out the sanitary thin paper 2 to the upper surface 4C of the package 1. An outlet 6, which is an opening of the is formed. In the packaging body 1 according to the present invention, since the bundle 3 is of a pop-up type, when one sheet of sanitary thin paper 2 at the top of the bundle 3 is pulled out from the formed outlet, the next sanitary sheet located immediately below it is pulled out. A part of the thin paper comes to be exposed from the outlet. In addition, since the outlet forming portion 5 has the easy-cleavage lines 50 arranged in a ring, the outlet 6 formed by separating and removing the range surrounded by the easy-cleavage lines 50 is formed only in a straight line. It does not have a slit shape, but has a certain width in the depth direction. Such outlet-forming portion 5 is formed by tearing off a range surrounded by easy-cleavage line 50 so as to continuously pull from one end portion 5A toward the other end portion 5B. Since the film in the range of can be separated and removed, it is excellent in operability at the time of opening. In this specification, the end located on the left side of the drawing is described as one end 5A, and the end located on the right side is described as the other end 5B. These can be replaced.

The package 1 of the form shown in FIGS. 1 to 5 has a substantially gourd-shaped outlet forming part 5, which is a particularly preferable shape. The outlet forming portion 5 includes a narrow portion 51 extending in the width direction at the central portion in the depth direction of the upper surface 4C, and an end portion of the narrow portion 51 extending outward in the width direction of the bundle 3. It has a widened portion 52 that gradually widens with increasing distance from the narrow portion 51 and a curved convex portion 53 that is continuous with the widened portion 52 and bulges outward in the width direction of the bundle 3 .

It is particularly desirable that the widened portion 52 is arranged so that the easy tearing line 50 gradually increases in angle with respect to the width direction toward the outside in the width direction of the bundle 3 . The easy-cleavage line 50 forming the edge of the widened portion 52 preferably has a taper angle ∠α of 25 to 60 degrees with respect to the width direction.

In addition, it is desirable that the easy-cleavage line 50 is formed in a curved line and connected smoothly from the widened portion 52 to the curved convex portion 53 . When the easy-cleavage line 50 is arranged in this way, the easy-cleavage line 50 is easily cleaved smoothly from the widened portion 52 toward the curved convex portion 53 .

In the embodiment shown in FIGS. 1 to 5, the outlet 6 formed by the outlet forming portion 5 has a substantially trapezoidal shape in which the vicinity of the edge extending from the narrow portion 51 to the widened portion 52 is easily movable in the vertical direction. Therefore, as shown in FIG. 4, when a set of sanitary thin paper sheets 2 is pulled out from the stack 3, the edge strips 51A are deformed so as to be slightly rolled up in the direction in which they are pulled out. , the next exposed set of sanitary thin paper 2 is leaned against and supported. In addition, the outlet 6 formed by the outlet forming portion 5 is such that the base portion 2R of the next sanitary thin paper, which is partially exposed from the outlet 6 following the sanitary thin paper pulled out from the bundle 3, is formed by the edge of the curved convex portion 53. It deforms so as to be wound along 6E, and easily deforms into a highly upright columnar shape. Furthermore, since the recessed portion 6H is formed between the widened portion 52 and the curved convex portion 53 of the outlet forming portion 5 when the outlet 6 is formed, the base of the next sanitary thin paper partly exposed from the outlet 6 is formed. By fitting the portion 2R into the recessed portion 6H, the erectability is enhanced. In particular, in the outlet forming portion 5, the pop-up failure due to the depression of the inside of the packaging film of the sanitary thin paper, which is likely to occur when the rigidity of the sanitary thin paper is high, is less likely to occur. This action and effect is particularly effective in combination with the sanitary thin paper having the suitable basis weight and paper thickness as well as the suitable packaging film described later. However, the outlet forming portion 5 according to the present invention may have a shape that does not have the widened portion 52 as shown in FIG. In addition, the outlet-forming portion 5 may have a linear easy-cleavage line connected to the ring-shaped easy-cleavage line within a range that does not interfere with the effects of the present invention.

Moreover, in the shape of the outlet forming portion 5 having the narrow portion 51, the widened portion 52, and the curved convex portion 53 as shown in FIGS. The length L1 is 70% or more of the length L2 in the width direction of the upper surface of the bundle 3, and the maximum length L3 in the depth direction of the entire outlet forming portion 5 is 10% or more of the length L4 in the depth direction of the upper surface of the bundle 3. 40%, the length L5 in the width direction of the narrow portion is 50 to 70% of the length L2 in the width direction of the upper surface of the bundle 3, and the length L6 in the depth direction of the narrow portion is the length of the bundle 3 is preferably 0.5 to 10% of the length L4 in the depth direction of the upper surface of the . Such a shape of the outlet forming portion 5 is such that a curved convex portion 53 that is wide especially in the depth direction is formed. In addition, the free edge piece 51A formed near the edge of the narrow portion 51 becomes wider and larger, so that the space between the narrow portions 51 can be widened when pulled out. Therefore, when the sanitary thin paper 2 is pulled out from the bundle 3, it can be taken out smoothly. In particular, it is difficult to form a clear folding line at the boundary between the short side 4A and the upper surface 4C, such as gusset packaging and pillow packaging, and the packaging film at the upper surface position of the package 1 is easily deformed. Even if the sanitary thin paper 2 to be used is a highly rigid sanitary thin paper 2 such as a paper towel with the above basis weight and paper thickness, and the upper surface position of the package 1 is likely to be deformed when the sanitary thin paper 2 is pulled out, when the sanitary thin paper 2 is pulled out The entire upper surface is less likely to be distorted and is easily maintained flat, and when the sanitary thin paper 2 is to be taken out one by one, it is particularly stable and easy to take out. In addition, the substantially trapezoidal free edge piece 51A formed near the edge of the narrow portion 51 is wider and larger, and the deep recessed portion 6H is formed. Since the edge piece can be firmly supported and the base portion 2R of the sanitary thin paper 2 is supported, it is effectively prevented from falling. In addition, since the length of the edge of the curved convex portion 53 is increased, the sanitary thin paper 2 is gently wound along the edge of the curved convex portion 53. As a result, it becomes more orthostatic.

It is desirable that the length L3 of the curved convex portion 53 in the depth direction is specifically 25 to 45 mm, and the bulging length L7 in the width direction is 2.5 to 12.5 mm.

On the other hand, specific examples of the flexible resin-made packaging film 4 constituting the exterior of the package 1 include polyethylene film, polypropylene film, polyester film, polyethylene terephthalate film, nylon film, vinylidene chloride film, and ethylene vinyl alcohol. Examples include monolayer films of copolymers, appropriately laminated laminate films containing these films, and gas barrier films obtained by subjecting these films to surface treatment such as aluminum vapor deposition. Biomass films derived from plant materials such as sugarcane, potato (starch), and corn can also be used. The use of such biomass films is desirable from the viewpoint of environmental protection.

Polypropylene film and polyethylene film are particularly suitable. Moreover, the packaging film 4 may be a satin-finished film that is excellent in design and touch. The melting point of the film is preferably 150° C. or lower. The lower the melting point of the packaging film, the lower the heat-sealing treatment can be performed, but the practical lower limit is 80°C. Examples of polypropylene films include unstretched polypropylene films (CPP), and examples of polyethylene films include linear low-density polyethylene films (LLDPE), low-density polyethylene films (LDPE), and medium-density polyethylene films (MDPE).

Furthermore, ethylene vinyl alcohol copolymer resin film and polyethylene terephthalate resin film, which have excellent fragrance retention properties, are desirable for packaging scented tissue paper and other scented items. Even if it is a multi-layer resin film in which a polyethylene resin film or a polypropylene resin film is laminated on one or both sides of an ethylene vinyl alcohol copolymer resin film or a polyethylene terephthalate resin film to enhance the heat-sealing property. good.

5 and 6, the outlet forming portion 5 according to the present invention has at least one edge in the width direction of the outlet forming portion 5 (the other end 5B in the illustrated example). A deformed cut portion 50D in which the easy tear line 50 is connected to the end of the main cut portion 50m at an angle of 90 ° or more and a V-shaped end cut portion 50e is connected to the non-cut It has perforations aligned through the portion 50U. As shown in FIG. 5, the modified cut portion 50D includes a modified cut portion 50D ¹ having a doglegged end cut portion 50e at one end and a doglegged end cut portion 50e formed at both ends. It can be a modified cut portion 50D ² that has a shape, and these may be mixed. As shown in FIGS. 6(a) and 6(b), the modified cut portion 50D having a dogleg-shaped end cut portion 50e at one end may be used alone. Furthermore, in particular, as shown in FIG. 6B, a mode in which a cut portion 50C having no end cut portion 50e is arranged between perforations in which the modified cut portions 50D are arranged via the non-cut portion 50U. can also be

In addition, in the shape of the outlet forming portion 5 shown in FIGS. 1 to 6, in particular, 80% or more of the portion constituting the edge of the curved convex portion 53 is the deformed cut portion 50D and the non-cut portion 50U. The portions 50P are arranged alternately. In this curved convex portion 53, preferably 90% or more, particularly preferably 95% or more, is a portion 50P in which the deformed cut portion 50D and the non-cut portion 50U are alternately arranged. good. The entire range may be composed of easy-cleavage lines in which deformable cut portions 50D and non-cut portions 50U are alternately arranged. 5 and 6 illustrate a form in which the portion forming the edge of the curved convex portion 53 has a portion 50P in which the deformed cut portion 50D and the non-cut portion 50U are alternately arranged. However, the present invention is not limited to this, and as shown in FIG. They may be arranged alternately.

More specifically, the end cut portion 50e of the modified cut portion 50D includes a first cut portion 50e 1 following the main cut portion 50m and a second cut portion 50e ¹ following the first cut portion 50e ¹ , as particularly shown in FIG. 50e ² , which are connected at an angle ∠β of 90° or more to form a dogleg shape.

Furthermore, in the arrangement form of the modified cut portions 50D in the portion where the modified cut portions 50D and the non-cut portions 50U are alternately arranged, a part of the end cut portion 50e is provided with the end cut portion of the adjacent modified cut portion. The end portion 50t is arranged to overlap at least one of the outer side and the central side in the width direction of the outlet forming portion 5, and an end cut portion 50e and an end cut portion are provided. The deformed cut portion 50D located on the outer side in the width direction of the outlet forming portion 5 overlaps with the end portion 50t that is not cut so that it is positioned on the outer side in the width direction of the outlet forming portion 5. , are configured to overlap. FIG. 5 shows an example in which the end cut portions 50e are arranged so as to overlap only on the outer side of the outlet forming portion 5 in the width direction. It is not necessary to be positioned further outward, and as in the form shown in FIG. Alternatively, as shown in FIG. 6(a), the end cut portion 50e overlaps the outer side of the outlet forming portion 5 in the width direction and the central side of the outlet forming portion 5 in the width direction. They may be mixed with overlapping ones. In the present invention, instead of the end cut portion 50e, the deformed cut portion 50D positioned on the outer side in the width direction of the outlet forming portion 5 may be overlapped so as to be on the outer side. The same applies when the cut portion 50C without the end cut portion 50e overlaps with the end cut portion 50e. When the portion 50C is positioned further outward in the width direction of the outlet forming portion 5 than the adjacent deformed cut portion 50D, the end of the cut portion 50C that does not have the end cut portion 50e is located at the deformed cut portion 50D. It is preferable that they are overlapped so as to be on the outer side in the width direction of the outlet forming portion 5 from the end cut portion 50e.

Also, the ^second cut portion 50e2 of the end cut portion 50e is preferably arranged substantially parallel to the main cut portion. Note that "substantially parallel" does not have to be completely parallel, and an error of approximately ±10° may be allowed.

The outlet-forming portion 5 according to the present invention is finally cleaved in a general unsealing operation in which the range surrounded by the easy-cleavage line 50 is continuously pulled from the one end portion 5A toward the other end portion 5B. A portion 50P in which a deformed cut portion 50D and a non-cut portion 50U are alternately arranged is provided at the end portion in the width direction (the other end portion 5B in the illustrated example), which is the portion that is most likely to tear. In the portion 50P in which the deformed cut portion 50D and the uncut portion 50U are alternately arranged, generally, the area surrounded by the easy-cleavage line 50 is continuously pulled from the one end portion 5A toward the other end portion 5B. At the edge of the other end portion 5B, when an unsealing operation is performed, the end cut portion 50e and the end portion 50t where the end cut portion is not provided are overlapped in the adjacent deformed cut portion 50D. Since the deformed cut portion 50D located on the outer side in the width direction of the forming portion 5 overlaps with the outer side in the width direction of the outlet forming portion 5, the deformed cut portion 50D overlaps with the uncut portion 50U. , the end cut portion 50e that has already been cut exists at a position further outside in the width direction than the tip of the pulling direction. Even if a minute tear occurs in the packaging film when tearing, the tear continues to the end cut portion 50e of the adjacent deformed cut portion 50D that has already been torn immediately after that, and the tear progresses further. no more. Furthermore, since the ends of the adjacent deformed cut portions 50D are shifted in both the width direction and the depth direction, there is a If the uncut portion 50U between them is twisted immediately before cutting, the tearing or elongation of the film is less likely to occur. In this way, by forming a portion 50P in which the deformed cut portion 50D and the uncut portion 50U according to the present invention are alternately arranged at the end portion in the width direction (the other end portion 5B in the illustrated example), the package can be unsealed. It is easy to open and the risk of tearing when unsealing is reduced. Further, since the end cut portion 50e is continuous with the main cut portion 50m at an angle of 90° or more, the cut is smoothly opened from the end cut portion 50e to the main cut portion 50m. Furthermore, if the angle between the first cut portion 50e ¹ and the second cut portion 50e ² is 90° or more, the cut opens more smoothly.

In particular, a substantially gourd-shaped shape having a narrow portion 51, a widened portion 52, and a curved convex portion 53 as shown in FIGS. In the one having a range, the range of the easy-cleavage line forming the edge portion of the curved convex portion 53 is long and is arranged along the depth direction, so that the pulling direction and the easy-cleavage line at the time of opening are different. The crossing angle with the tearing direction is large, and the shape is such that the packaging film 4 is likely to tear during the opening operation. However, by providing the portion 50P in which the deformed cut portion 50D and the uncut portion 50U according to the present invention are alternately arranged at the end portion, the risk of tearing is significantly reduced. It is particularly effective in packaging forms such as pillow packaging and gusset packaging, in which the longitudinal direction (MD direction) of the packaging film 4 is parallel to the longitudinal direction of the outlet forming portion 5 and tearing is likely to occur. be.

In addition, in the outlet forming portion 5 according to the present invention, in the portion 50P in which the deformed cut portions 50D and the non-cut portions 50U are alternately arranged, the position of the end of the deformed cut portion 50D is shifted to the main cut portion by the end cut portion 50e. Since the position is slightly shifted inward or outward in the width direction from the extending direction of 50 m, when the outlet 6 is formed, the uncut portion 50U becomes slightly convex and has a serrated edge. For this reason, when drawing out a set of sanitary thin papers 2 from the bundle 3, the serrations are applied to the base portion 2R of the next set of sanitary thin papers 2, which is partially exposed from the take-out port following the taken out sanitary thin papers. The edge of the shape clamps the edge in the width direction of the sanitary thin paper 2 to enhance the prevention of falling.

Here, as shown in FIG. 5, in a particularly preferable form of the outlet forming portion 5 according to the present invention, the deformed cut portion 50D is positioned on the width direction extension line of the center C in the depth direction of the narrow portion 51. There is a modified cut portion ^50D2 having end cut portions 50e overlapping the outer side in the width direction at ^both ends of the modified cut portion. In this embodiment, a deformed cut portion 50D ¹ having an end cut portion 50e overlapping in the width direction only at the end portion positioned outward in the depth direction from the center C in the depth direction of the narrow portion 51 is formed. In the outlet forming portion 5 shown in FIG. 5 as well, in a general unsealing operation in which the area surrounded by the easy tearing line 50 is continuously pulled from the one end portion 5A toward the other end portion 5B, the deformed cut portion The end cut portions 50e of the adjacent

deformed cut portions

50D ¹ and 50D ² are present at positions on the outer side in the width direction that precede the ends of 50D ¹ that do not have end cut portions in the tensile direction. Therefore, even if a minute tear occurs in the packaging film when the non-cut portion 50U therebetween is torn during the unsealing operation, the tear immediately follows the already torn end cut portion 50e. It is easy to tear, and it becomes difficult to proceed further.

The length ratio of the modified cut portion 50D and the uncut portion 50U at the end of the outlet forming portion 5 is not necessarily limited, but the length L8 of the modified cut portion 50D is not limited, but is preferably 5 mm or more and 20 mm or less. is preferably 7 mm or more and 13 mm or less. In addition, the length L9 of the first cut portion 50e ¹ and the second cut portion 50e ² of the end cut portion 50e need not be the same, but is 0.2 mm or more and 3.0 mm or less, preferably 0.5 mm or more. 0.5 mm or less is desirable. Furthermore, it is desirable that the length L11 of the uncut portion 50U between the deformed cut portions 50D is 0.2 mm or more and 3.0 mm or less, preferably 0.3 mm or more and 2.0 mm or less.
Furthermore, the overlap width L12 between the end cut portion 50e and the end portion of the adjacent modified cut portion where the end cut portion is not provided is not necessarily limited, but is 0.2 mm or more and 3.0 mm or less, preferably 0.2 mm or more. It is desirable to be 3 mm or more and 2.0 mm or less. In these ranges, tearing is extremely difficult to occur between the deformed cut portions 50D, and the non-cut portions 50U are cut, so that tearing progresses continuously and smoothly.

Also, the angle ∠β between the main cut portion 50m and the first cut portion 50e ¹ in the end cut portion 50e and the angle ∠γ between the first cut portion 50e ¹ and the second cut portion 50e ² are Although they do not have to be the same, they are preferably in the range of 90° or more. It is preferably in the range of 100° or more, more preferably 120° or more. In addition, it is desirable that the main cut portion 50m and the first cut portion 50e ¹ and the first cut portion 50e ¹ and the second cut portion 50e ² are chamfered, and they are the same. Although not necessary, the curvature is not limited, but R0.1 to R2.0 is preferable, R0.2 to 1.2 is more preferable, and R0.4 to 1.1 is particularly preferable. . With this curvature, the opening of the deformed cut portion proceeds smoothly from the main cut portion 50m to the end cut portion 50e or from the end cut portion 50e to the main cut portion 50m.

In addition, in the easy-cleavage line 50 constituting the edge of the outlet-forming portion, the portions 50P in which the deformed cut portions 50D and the uncut portions 50U are alternately arranged are located at both ends of the outlet-forming portion 5. It can also be at one end only. If it is formed only on one side, the opposite end is, for example, as shown in FIG. The range L10 up to the crossing position can be made a continuous cut portion. In this way, as shown in FIG. 8(b), a free piece 5T is formed in a range from one depth side to the outer side end at one end 5A of the outlet forming portion 5, and the free piece 5T is formed. It becomes easier to pick up and roll up, and the opening operation becomes easier.

Here, the thickness of the packaging film 4 may be selected as appropriate, but the thickness measured according to JIS P 8118 (1998) is preferably 20 to 75 μm. If the thickness is 20 to 75 μm, the effects of the present invention can be exhibited particularly effectively. For the thickness, after sufficiently conditioning the humidity of the measurement sample under the conditions of JIS P 8111 (1998), dial thickness gauge (thickness measuring instrument) "PEACOCK G-1A type" (manufactured by Ozaki Seisakusho Co., Ltd.) and its equivalent Measure using

In the easy tear line 50 constituting the outlet forming portion 5 according to the present invention, the portions other than the portion where the deformed cut portion 50D and the uncut portion 50U are alternately arranged are perforations and uncut portions (non-cut portions). A slit cut or the like provided with a cut portion) can be used. However, it is not limited to this.

The type of perforation is not limited as long as the portion other than the portion aligned through the deformed cut portion 50D and the non-cut portion 50U is used as the perforation. Examples include normal perforations in which the cut portion 50C is a straight line, micro perforations in which the cut portion is a hole, and zipper perforations in which the shape of the cut portion is Y-shaped, substantially L-shaped, or <-shaped. Preferred are normal perforations. A slit cut is a portion obtained by cutting a film into a slit shape, and by having a non-cut portion, the non-cut portion and the cut portion are arranged alternately. A slit cut having a non-cut portion may be simply referred to as a slit cut. A slit cut having perforations and a non-cut portion may not be distinguished, but in the present invention, a slit cut is a normal linear cut portion that has two normal straight cut portions, except for a unique shape such as the deformed cut portion 50D. It is called a slit cut when it is less than the pitch, that is, when two normal cuts of the same length are not consecutive. In general, the slit cut is formed so that the length of the cut portion is longer than the perforations.

The cut tie ratio of the slit cut having perforations and non-cut portions in portions other than the portions where the deformed cut portions 50D and the non-cut portions 50U are alternately arranged is an appropriate interval depending on the ease of tearing of the film used. , the length of the cut part is 0.8 mm or more and 20.0 mm or less, and the length of the uncut part (tie part or uncut part) is appropriately from the range of 0.3 mm or more and 5.0 mm or less. should be designed to

In addition, part or all of the uncut portion 50U of the easy tear line 50 according to the present invention faces the bundle 3 from the surface side, which is the surface that does not face the bundle 3, in the thickness direction of the packaging film 4. It is possible to form a half-cut portion that is cut to a predetermined depth range in the thickness direction, although it is not completely cut down to the back side, which is the side to be cut. By making the uncut portion 50U into a half-cut portion with a notch, the force required for tearing the packaging film 4 is reduced, and the tearing of the easy-cleavage lines 50 facilitates continuous and smooth tearing. The end portion of the outlet forming portion 5, particularly the non-cut portion 50U between the deformed cut portions 50D located in the curved convex portion 53, may be a half-cut portion. The depth of the cut in the half-cut portion is not limited, but is preferably 20% or more and 80% or less of the thickness of the packaging film.

In addition, in the shape having the narrow portion 51, the widened portion 52, and the curved convex portion 53 as shown in FIGS. Since the pulling direction during the unsealing operation coincides with the extending direction, it is desirable that the non-cut portion is configured with perforations that are not half-cut portions. The edge of the narrow portion 51 is less likely to tear unintentionally.

In addition, the slit cut having perforations and non-cut portions, including the portions where the cut portions 50C and the half-cut portions are alternately arranged, is formed at once by die cutting, for example. be able to.

Next, Examples 1 to 4 of the present invention and Comparative Examples 1 and 2 were produced, and tests were conducted on the sinking of the sanitary thin paper and the tearing of the unsealing outlet. The shape of the outlet forming portion of the package according to Examples 1 to 4 and Comparative Example 1 is a substantially gourd shape having a narrow portion, a wide portion, and a curved convex portion shown in FIGS. 1 to 5. . The outlet forming portion of the package according to Comparative Example 2 is a simple linear perforation.

A bundle of 1-ply paper towels (trade name: Raku La Cook Kitchen Paper, basis weight: 20 g/m ² , paper thickness: 220 µm) was folded up in a pop-up manner. Moreover, the packaging form according to each example is gusset packaging, and the stretching direction of the packaging film is a direction orthogonal to the width direction of the outlet forming portion.

In the "number of times of depression" test, the easy tearing line related to the outlet forming part is cleaved to form an outlet, and the paper towels constituting the bundle are pulled out from the outlet in order up to the last one. , counted the number of times the drop actually occurred.

"Openability" was evaluated by having a subject pick up one end of each sample and pull it toward the other end to open the sample, and check whether or not the other end of the outlet is torn. was evaluated. With N=10, the cases where cracks occurred were evaluated as "yes", and the cases where they did not occur were evaluated as "no".

Table 1 below shows the dimensions of the outlet forming part, the ratio of the length in the depth direction and the length in the width direction of the upper surface of the bundle, and the test results in each example.

From Table 1, Examples 1 to 4, in which a deformed cut portion and a non-cut portion are alternately arranged in the portion that constitutes the edge of the end portion (curved convex portion), have the maximum length in the depth direction of the outlet. In other words, the length in the depth direction of the curved convex portion, which is the end portion, is as long as 35 mm, and the range is 30% of the depth direction of the upper surface of the bundle, making it easy to tear. , There was no confirmed tear at the end of the outlet.

In Comparative Example 1, the cut portion of the curved convex portion in Example 1 was not a deformed cut portion but a conventional general cut portion without an end cut portion. , a tear occurred at the end of the outlet. Even if it is an easy-cleavage line that forms the edge of a very long curved convex portion as in the example, the portion should be alternately arranged with deformed cut portions and non-cut portions. showed that tearing at the edge of the outlet was prevented during the opening operation.

Therefore, for example, in the case of another narrow outlet shape that does not have a widened portion as shown in FIG. It can be said that tearing of the edge of the take-out port during the opening operation can be further prevented by disposing it in the opening.

In addition, with regard to the number of depressions, the number of depressions was confirmed to be 12 in Comparative Example 2, in which the outlet forming portion is a single perforation and the outlet is a slit. On the other hand, in Examples 1 to 4 and Comparative Example 1, the number of drops was 0 and no drop could be confirmed. In other words, it was shown that the ejection port having the shape of the ejection port forming portion having the narrow portion, the widened portion, and the curved convex portion is particularly excellent in preventing sagging.

From the above, the package according to the present invention has excellent opening properties because the edge in the width direction of the outlet is difficult to tear when opened, and is also excellent in drawing out sanitary thin paper, especially hard sanitary thin paper such as paper towels. It is a packaging body of film packaging.

1 Package 2 Sanitary thin paper 2A Folded inside 2B Folded piece 2C Folded edge 2R Root part of sanitary thin paper exposed from outlet 3 Bundle of sanitary thin paper 3A Short Hand side 3B Long side 3C Upper and lower sides of bundle 4 Packaging film

4A Short side

4B Long side

4C Upper side

4D Lower side 4X Overlapping portion of packaging film 5

Outlet Forming portion

5A, 5B Longitudinal end 5T Free piece 6 Outlet 6E Edge of Outlet 6H Indentation in Outlet.
50... Easy splitting line, 50D, ^50D1 , ^50D2 ... Deformation cut portion, 50m... Main cut portion, 50e... End cut portion, 50e1... ^First cut portion, 50e2... ^Second cut portion, 50t... Deformation ∠β... Angle between main cut part and first cut part ∠γ... Angle between first cut part and second cut part 50C... Cut part 50U... Non-cut part (tie part) 50P... Part where deformed cut part and non-cut part are alternately arranged 51... Narrow width part 51A... Approximately trapezoidal edge piece 52... Widened part 53... Curved convex part, ∠α: taper angle of widened part. Q: Overlapping portion.
L1: length in the width direction (longitudinal direction) of the outlet forming portion, L2: length in the width direction (longitudinal direction) of the upper surface of the bundle, L3: maximum length in the depth direction (lateral direction) of the outlet forming portion, L4: length of the upper surface of the bundle in the depth direction (transverse direction), L5: length of the narrow portion in the width direction (longitudinal direction), L6: length of the narrow portion in the depth direction (transverse direction), L7. . Range up to the position exceeding the outer side end of the convex portion, L11 ... length of the non-cut portion between the modified cut portions, L12 ... overlap width of the edge portion of the adjacent modified cut portion where the end cut portion is not provided .
105... Outlet forming part, 105A... One end of the outlet forming part, 105B... The other end of the outlet forming part, 105P... Film tear, 150... Perforation, 150e... Perforation at the end in the width direction, X : longitudinal direction (width direction), Y: direction perpendicular to the longitudinal direction (depth direction), Z: thickness direction of the packaging film, C: center of the narrow portion in the depth direction.

Claims

A packaging body in which a bundle of sanitary thin paper is wrapped with a flexible resin packaging film,
Having an outlet forming portion formed by arranging an easy-cleavage line in a ring on the upper surface,
The easy-cleavage line forming the edge of at least one end in the width direction of the outlet-forming portion,
At one end or both ends of the main cut portion, a dogleg-shaped end cut portion is connected at an angle of 90° or more, and the modified cut portion has perforations arranged through the non-cut portion,
The end cut portion and the end portion of the adjacent modified cut portion where the end cut portion is not provided overlap at least one of the outer side and the center side in the width direction of the outlet forming portion. , and
As for the overlap between the end cut portion and the end portion where the end cut portion is not provided, the deformed cut portion located on the outer side in the width direction of the outlet forming portion is positioned more outward in the width direction of the outlet forming portion. side by side, overlapping
A package characterized by:
The outlet forming portion includes a narrow portion extending in the width direction at the central portion in the depth direction, and a widened portion continuously extending from the end portion of the narrow portion toward the outside in the width direction and gradually widening as it separates from the narrow portion. and a curved convex portion that is continuous with the widened portion and bulges outward in the width direction,
2. The package according to claim 1, wherein a portion forming an edge of at least one curved convex portion of the easy-cleavage line has perforations in which deformed cut portions and non-cut portions are alternately arranged.
The package according to claim 2, wherein 80% or more of the area constituting the edge of the curved convex portion is perforations in which the deformed cut portion and the non-cut portion are alternately arranged.
The package according to claim 2, wherein the length of the curved convex portion in the depth direction is 25 to 45 mm, and the bulging length in the width direction is 2.5 to 12.5 mm.
The outlet forming portion has a length in the width direction of 70% or more of the width of the upper surface of the bundle, a maximum length in the depth direction of 10 to 40% of the length of the upper surface of the bundle in the depth direction, and is narrow. The length of the bundle in the width direction of the part is 50 to 70% of the length of the upper surface, and the length in the depth direction is 0.5 to 10% of the length of the upper surface of the bundle in the depth direction. Item 5. The package according to any one of Items 2 to 4.